Flask



FIG. 1 is a perspective view of a flask, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is aright side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom side view thereof.

The lighter and thinner broken lines on the top of the article depictportions of the article that form no part of the claimed design.

The darker and thicker broken lines that run the perimeter of the flaskrepresent stitching on the article and are claimed.

CLAIM I claim the ornamental design for a flask, as shown and described.